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The procedure and apparatus for the test carried out for the air cleanliness classes by particle concentration and for macroparticles are provided in BS EN ISO 14644-1 and specifications for monitoring air cleanliness by nanoscale particle concentrations are provided in BS EN ISO 14644-12
NOTE 2 Arrows indicate load direction
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Safety devices required for the safe functioning of equipment with respect to explosion risks algolia-ignore The procedure and apparatus for1 Scope This European Standard specifies the requirements of electrical safety devices, which are used to avoid potential ignition sources of equipment in explosive atmospheres. This also includes safety devices, which are operated outside areas with explosive atmospheres, to guarantee the safe function of equipment with respect to explosion hazards. NOTE 1 This European Standard can also be used to design and assess safety devices for protective
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